Sheet-opening mechanism



Jam 23, 1%923. 1,443,179

J. A. HELLSTROM. SHEET OPENING MECHANISM. FILED FEB. 1.1922

2 SHEETSQSHEET 1 Snow J01:

Jan. 23, 11923.

J. A. HELLSTROM.

SHEET OPENING MECHAN SM.

2 SHEETS SHEET 2 FILED FEB. I.

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it atented Jan, 2, i935.

IoIIn a. nnnrisrnoiu, or wnnnrirne, WEST VIRGINIA.

srInnr-ornmne IIncnAnIsII.

Application inearetruar 1, 1922. Serial no. 533,442. 7

To all whom it may "concern Be it known that I, Jenn A. HnLLsTnoM,

a subject of the King of Sweden, and resident of Wheeling, county of Ohio, and State of of sheets which have become bonded in the rolling of a sheet-metal pack.

The primary object of the invention is to provide a simple and efficient device whereby metal sheets bonded together in rolling may be mechanically separated or stripped each from the other inan expeditious manner involving the separate gripping of such sheets and the positive advance thereof on opposite sides of a stationary splitting element.

A further oh ject is to provide a mechanism of the charactermentioned which has a Construction providing for practically instantaneous release of the sheets, as when withdrawal of the latter is desired.

in describing the invention in detail, reference is herein had to the accompanying drawings, in which j Figure 1 is a longitudinal section of a machine embodying my invention, and- Figure 2 is a section on line 22, Fig. 1. Referring to sa d drawings, 1 indicates roll houslngs 1n which are arranged su table bearings 2 and 3 carrying positively driven rolls 4 and 5 having their axes located in a common vertical plane. Said rolls are located a considerable distance apart, and interposed therebetween are 7 two relatively smaller rolls 6 and 7 which have their axes located in the aforesaid vertical plane, said smaller rolls having their opposite 1 ends journaled intermediate the ends of substantially horizontal carrier bars 8 of suitable length which are disposed in slots or recesses provided in the opposite housings 1, having their rear ends pivotally mounted upon pivot pins or bolts 9 mounted in said housings.

R-igidly carried by said carrier bars 8 rearward of the intermediate rolls 6 and 7 are the opposite ends of a transverse spreader bar 10 which is herein shown to be of semicylindrical form in cross section with its flat face presented toward said intermediate rolls, though it may have any other suitable form. Carrle'd by the forward end portions I 83f of said bars 8 a horizontal transversely disposed plate 11 upon opposite sides of which the separated sheets emerge and are direrted to a suitably located delivery table, as 1 The driven roll 4 is vertically movable, the bearings 2 therefor being carried by vertical rods 13 which are norinally maintained by supporting springs 14 in elevated positions. Said roll is adapted to be thrust downward against the tension of said springs by means of adjustable pressure screws 15 carried bythe housings, as ordinarily.

The forward end portions 8 of the bars 8 rest upon coil springs 16 whichnormally hold said bars in an upwardly-swung position in which the lower of the intermediate rolls is elevated out of cooperative sheetadvancing relation to the lower of the driven rolls. Adjustable stops are also employed for limiting the upward swing of said bars 8. Said stops, as herein shown, C0111- prise arms 17 pivoted intermediate their ends upon pins 18 mounted in the housings and having depending nose-like inner ends 17 overhanging the forward end portions 8 of said bars. Screws 19 carried by the outer endsof said arms 17 have theirlower ends resting upon supporting lugs 20 formed on the housings and are adapted for adjust ment to position the arms 17 for arresting the elevating movement of the bars 8 at any desired height. I y

In practice, the operator spreads apart the edges of one end of a pair of adhering sheets, commonly termed sticlzers, and with said sheets supported, or partially supported, upon a suitably located feed table 21, directs said edges of the sheets on opposite sides of the spreader bar to points wherein the upper thereof is introduced between the upper driven roll 4 and the upper intermethe springs 14, and, second, against the tension of springs 16. Tractive force exerted by th rolls acts to separately advance said sheets, drawing the latter at a uniform speed over opposite sides of the spreader bar 10, whereby said sheets are forcibly stripped each from the other.

Should it at any time become desirable or necessary to stop the advance movement of the sheets, the same may be promptly effected by such a partial rearward rotation of the roll adjusting screws 15 as may be neces sary to permit withdrawal of the upper driven roll 4 from frictional gripping relation to the underlying sheet. Such movement of said screws 15 may beeffected by any suitable known means or instrumentality. Obviously, due to the fact that intermediate, or friction, rolls 6 and 7, actuated by the springs 16, follow the upward movement of the upper driven roll 4: until the portions 8 of the carrier bars 8 strike against the stop-arms 17 the lower of the sheets is release-d contemporaneously with the release of the upper sheet.

What is claimed is l. A sheet-opening mechanism comprising a pair of driven rolls, a pair of rolls located intermediate'said driven rolls with their axes 'in the same plane with those of said driven rolls, said intermediate rolls being adapted to be driven by friction from said driven I rolls, yieldable means normally supporting said intermediate rolls in a position wherein the lower thereof is out of operative relation to the lower driven roll, means for shifting the upper driven roll to and from a position in which it depresses said inter 'mediate rolls against the tension of said yieldable means, and a spreader element lo- .cated in front of said intermediate rolls.

j 2. A sheet-opening mechanism comprising a pair of driven rolls, a pair of rolls located intermediate said driven rolls with their axes in the same plane with those of driven rolls, said intermediate rolls being adapted to be driven by friction from said driven rolls, yieldable means normally supporting said intermediate rolls elevated in an inoperative position with respect to the lower driven roll, means for shifting the upper driven roll into and out of operative relation to the upper intermediate roll, said upper driven roll being adapted to depress said intermediate rolls against the tension of said yieldable means, and a transversely disposed sheet-spreading member located in front of said rolls.

3. A sheet-opening mechanism comprising separated driven rolls, a pair of friction rolls of relatively small diameters intorposed between said driven rolls, all of said rolls having their axes in a common plane, means normally supporting said friction rolls in a position in which the lower thereof is out of pressureexerting relation to the lower driven roll, the upper driven roll being movable into and out of depressing relation to the friction rolls and adapted in its lowered position to cause each of said fries tion rolls to assume sheet-advancing relation to the adjacent driven roll.

4-. A sheet-opening mechanism comprising a pair of driven rolls, a pair of rolls located intermediate said driven rolls with their axes in the same plane with those of said driven rolls. said intermediate rolls being adapted to be driven by friction from said driven rolls, substantially horizontal carrier bars in which said intermediate rolls are mounted, said bars being pivotally mounted on the housings, yieldable means normally supporting said bars in a position in which the lower of said intermediate rolls is withdrawn from operative relation to the lower driven roll, means for shifting the upper driven roll to and from a position in which it depresses said intermediate rolls against the tension of said sup iorting means, and a sheet-spreading mem er located in front of said rolls.

5. A sheet-opening mechanism comprising a pair of driven rolls, a pair of rolls located intermediate said driven rolls with their axes in the same plane with those of said driven rolls, said intermediate rolls being adapted to be driven by friction from said driven rolls, substantially horizontal carrier bars in which said intermediate rolls are mounted, said bars being )ivotally mounted on the housings, yieldable means normally supporting said bars in positions in which the lower of said intermediate rolls is withdrawn from operative relation to the lower driven roll, means for limiting the extent of elevating movement of said bars, means for shifting the upper roll to and from a position in which the lower of said intermediate rolls is caused to assume -ooperative relation to the lower driven roll against the tension of said supporting means, and a stationary element on opposite sides of which sheets advanced by said rolls are drawn.

In testimony whereof, I atlix my signature in presence of two subscribing witnesses.

JOHN A. HELLFE'IRUM. Witnesses:

H. E. DUNLAP, CHAS. P. SoHLIcK.

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